保存页面的浏览记录

我的设计思想是将用户的浏览记录保存到cookie里面，然后根据情况处理。cookie里面的数据格式是json格式，方便根据自己的需要添加或者修改属性。
引用了3个js文件,下载地址如下。

https://github.com/carhartl/jquery-cookie/blob/master/jquery.cookie.js

https://github.com/douglascrockford/JSON-js/blob/master/json2.js

http://jquery.com/

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4     <title>浏览记录</title>
 5     <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
 6     <script type="text/javascript" src="../js/jquery-1.9.1.min.js"></script>
 7     <script type="text/javascript" src="../js/jquery.cookie.js"></script>
 8     <script type="text/javascript" src="../js/json2.js"></script>
 9     <script type="text/javascript">
10         String.prototype.format = function (args) {
11             if (arguments.length > 0) {
12                 var result = this;
13                 if (arguments.length == 1 && typeof (args) == "object") {
14                     for (var key in args) {
15                         var reg = new RegExp("({" + key + "})", "g");
16                         result = result.replace(reg, args[key]);
17                     }
18                 }
19                 else {
20                     for (var i = 0; i < arguments.length; i++) {
21                         if (arguments[i] == undefined) {
22                             return "";
23                         }
24                         else {
25                             var reg = new RegExp("({[" + i + "]})", "g");
26                             result = result.replace(reg, arguments[i]);
27                         }
28                     }
29                 }
30                 return result;
31             }
32             else {
33                 return this;
34             }
35         }
36 
37         //添加一个新的浏览记录
38         function addHistory(productName, url) {
39             var historyArr = getHistory();
40             historyArr.push({'productName':productName, 'url':url});
41             $.cookie('overviewHistory', JSON.stringify(historyArr), { expires:7, path:'/' });
42         }
43         //获取所有的浏览记录
44         function getHistory() {
45             var overviewHistory = $.cookie('overviewHistory');
46             if (typeof overviewHistory === "undefined") {
47                 return []
48             } else {
49                 return eval("(" + overviewHistory + ")");
50             }
51         }
52         //将浏览记录显示到相应的元素里面
53         function updateHistoryEle() {
54             var historyArr = getHistory();
55             historyArr.reverse()
56             //设置最大的显示数量
57             while (historyArr.length > 10) {
58                 historyArr.pop()
59             }
60             for (i = 0; i < historyArr.length; i++) {
61                 $('<div><a href="{1}">{0}</a></div>'.format(historyArr[i].productName, historyArr[i].url)).appendTo('#history');
62             }
63         }
64 
65         $(function () {
66             addHistory("亲的", "www.baidu.com")
67             updateHistoryEle()
68         })
69     </script>
70 </head>
71 <body>
72 <div id="history">
73 
74 </div>
75 </body>
76 </html>